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主要特征
应用/用途
Parametric specs for Battery Chargers
| Package/Pins | QSOP/28 |
| Budgetary Price (See Notes) | 6.53 |
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简化框图
Technical Docs
| 数据资料 | 低成本、多种化学类型电池充电器电路 | Mar 16, 2009 | |
| 应用笔记 | Smart Battery-Charging Schemes for Level 2 Chargers are Accurate and Efficient |
参量
Parametric specs for Battery Chargers
| Package/Pins | QSOP/28 |
| Budgetary Price (See Notes) | 6.53 |
主要特征
- Input Current Limiting
- ±0.5% Output Voltage Accuracy Using Internal Reference (0°C to +85°C)
- Programmable Battery Charge Current >4A
- Analog Inputs Control Charge Current and Charge Voltage
- Monitor Outputs for:
- Current Drawn from AC Input Source
- Charging Current
- AC Adapter Present
- Up to 18.2V (max) Battery Voltage
- 8V to 28V Input Voltage
- >95% Efficiency
- 99.99% (max) Duty Cycle for Low-Dropout Operation
- Charges Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc.
应用/用途
- 手持式终端
- 笔记本电脑和亚笔记本电脑
- PDA及其它手持设备
描述
The MAX1772 is a highly-integrated, multichemistry battery-charger control IC that simplifies the construction of accurate and efficient chargers. The MAX1772 uses analog inputs to control charge current and voltage and can be programmed by the host or hardwired. High efficiency is achieved by a buck topology with synchronous rectification.
Maximum current drawn from the AC adapter is programmable to avoid overloading the AC adapter when supplying the load and the battery charger simultaneously. This enables the user to reduce the cost of the AC adapter. The MAX1772 provides outputs that can be used to monitor the current drawn from the AC adapter, battery-charging current, and the presence of an AC adapter.
The MAX1772 can charge two to four lithium-ion (Li+) series cells, easily providing 4A. When charging, the MAX1772 automatically transitions from regulating current to regulating voltage. It is available in a space-saving 28-pin QSOP package.
Maximum current drawn from the AC adapter is programmable to avoid overloading the AC adapter when supplying the load and the battery charger simultaneously. This enables the user to reduce the cost of the AC adapter. The MAX1772 provides outputs that can be used to monitor the current drawn from the AC adapter, battery-charging current, and the presence of an AC adapter.
The MAX1772 can charge two to four lithium-ion (Li+) series cells, easily providing 4A. When charging, the MAX1772 automatically transitions from regulating current to regulating voltage. It is available in a space-saving 28-pin QSOP package.
Technical Docs
| 数据资料 | 低成本、多种化学类型电池充电器电路 | Mar 16, 2009 | |
| 应用笔记 | Smart Battery-Charging Schemes for Level 2 Chargers are Accurate and Efficient |
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